It’s a vicious cycle in the film business. We use scads of energy to light our sets, usually trying to make them look as natural as possible, then we use scads of energy to cool them. If we can reduce the power required for lighting, we can save money two ways. In the olden days of production, when I was starting out in the business, most movie lights (except for big arc lights) had tungsten or quartz lamps. These lamps employed a simple technology, like Edison’s light bulb, pushing so much electric current though a thin wire filament that it glowed and gave off light—and heat. Tungsten is still the most mature, least expensive, hottest, and least efficient lighting technology available. . . . CONTINUE READING: NAB 2011: Greening the Film Business—LED Fresnel Lights